The LED display common anode drive architecture means that the anodes of the diodes in the LED lamp have a common contact, and the contact is connected to the VCC terminal, which is in a high level state. In the common anode structure, the current flows from the PCB board to the lamp beads to provide unified power supply to the chip, and the forward voltage drop of the circuit becomes larger.
Compared with the common cathode drive architecture, the main difference between the common anode drive architecture is the driving method and supply voltage. In common anode driving, since the current flows from the PCB board to the lamp beads to provide unified power supply to the chip, the forward voltage drop is relatively large. In common cathode driving, the current first passes through the lamp bead and then to the negative electrode of the IC, making the forward voltage drop smaller and the conduction internal resistance also smaller.
In addition, the supply voltage of common anode drive is also different from that of common cathode drive. The supply voltage for common anode drive usually depends on the type of LED chip used, but is usually higher than the supply voltage for common cathode drive. This is because the common anode driver needs to ensure that the LED chip can emit light normally, so it needs to provide enough voltage to drive the LED chip.
In general, the LED display common anode driving architecture is an efficient and stable driving method suitable for various LED display applications.